Another thing to consider: the neoprene mats are basically two BattleTech maps side by side - the previews shown in the kickstarter are 31x17 hexes, plus a half-hex row on either edge of the map. The mats have been described at this size since the first set were produced as well. They're really designed for lance-level games.
To put a circle of equals on one mat, it'd either need to be 17x17, with a ton of space outside the circle: Which is definitely an option like the Steiner Stadium map from Solaris VII, but it's also a pretty small fighting space with no real space to manoeuvre. At 17 hexes across you're basically going to be at medium range for most big guns after you move on turn 1. The second option is more of an oval of equals, which would use the space better but also not be much of a circle.
Further, the description from the kickstarter was that this was a space used for grand melees, and 17x17 (or an oval 32 at its longest and 17 at its widest points) is going to be really crowded for that kind of fight. There'll still be space outside the map on the 2-mat circle of equals, but not as much
